#!/bin/bash

GDAL_TILE_PROCESSES=16
GDAL_TILE_ZOOMS=8-14
GDAL_SAMPLING_WARP=cubic
GDAL_SAMPLING_TILE=antialias

# Create virtual dataset with coordinates
gdal_translate -of VRT -a_srs EPSG:4326 -outsize 300% 300% -gcp 1224.0 1116.0 22.226666666666667 57.75 -gcp 13887.0 1149.0 22.826666666666668 57.75 -gcp 13914.0 11142.0 22.826666666666668 57.5 -gcp 1149.0 11067.0 22.226666666666667 57.5 I-12,I-13 Dondangen.jpg I-12,I-13 Dondangen.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1224.0 1116.0\n6846.0 1137.0016657412548\n6840.0 560.8400888395336\n10002.0 563.6801776790671\n10000.5 1141.4991671293724\n13887.0 1149.0\n13914.0 11142.0\n1149.0 11067.0" | \
  gdaltransform -tps -output_xy I-12,I-13 Dondangen.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  I-12,I-13 Dondangen.vrt I-12,I-13 Dondangen.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES I-12,I-13 Dondangen.cut.vrt I-12,I-13 Dondangen.xyz